Multiple Choice
Two independent samples of sizes 20 and 25 are randomly selected from two normal populations with equal variances. In order to test the difference between the population means, the test statistic is:
A) a standard normal random variable.
B) approximately standard normal random variable.
C) Student t distributed with 45 degrees of freedom.
D) Student t distributed with 43 degrees of freedom.
Correct Answer:
Verified
Correct Answer:
Verified
Q56: The sampling distributions we use for nominal
Q57: The sampling distributions we use for numerical
Q58: A statistics course at a large university
Q59: Videocassette recorder (VCR) tapes are designed
Q60: When the necessary conditions are met, a
Q62: When the necessary conditions are met,
Q63: The number of degrees of freedom associated
Q64: There are different approaches to fitness
Q65: The equal-variances test statistic of
Q66: Which of the following statements is